When the domain is registered to use HSTS their browser will use a TLS connection the first time they ever connect to your website.
> You want those redirected to a HSTS enabled HTTPS connection immediately
Websites that depend on advertising probably do as they often want to support very old browsers. Otherwise there's no real need for a redirect/connection upgrade IMO.
If you don't want to add your domain to the preload list, you will have to (automatically) redirect/upgrade users to HTTPS, or bounce them.
[0] - https://hstspreload.org/
which has the following requirements: 1. Serve a valid certificate. 2. Redirect from HTTP to HTTPS on the same host, if you are listening on port 80.
oops.
> if you are listening on port 80
You don’t have to accept trafic on the http port for HSTS preloading. But iff you do you must redirect it.
This rule makes sense; at least you should never serve content over http.